Detection Device

This application is a continuation of U.S. application Ser. No. 17/654,595, filed on Mar. 14, 2022, now U.S. Pat. No. 12,342,652, issued Jun. 24, 2025, which claims priority to Taiwan Application Serial Number 110124892, filed Jul. 7, 2021, which are herein incorporated by reference in their entireties.

The present invention relates to a detection device. More particularly, the present invention relates to a detection device applied to human bodies.

The medical testing technology has already progressed from invasive testing to non-invasive testing due to the advancement of science and technology.

In the process of detection, optical principles are used to detect a human body by some detection devices, and consumers always take the convenience of the optical detection devices in account. If the optical detection device is too large, it is unfavorable for the user to carry or wear. In addition, the manufacturers would like to show users new experience which is different from the existing optical detection devices, so as to attract more customers.

Therefore, how manufacturers can provide an optical detection device that can be miniaturized and innovative concepts for enhancing the convenience of use and product competitiveness has become one of the important issues.

The invention provides a detection device which includes a substrate, a light-emitter, and a light receiver. The substrate includes a first surface area and a second surface area, in which the first surface area has a first reflectance greater than a second reflectance of the second surface area. The light emitter is located on the first surface area. The light receiver is located on the second surface area, and the light receiver has a third reflectance which is substantially the same as the second reflectance of the second surface area.

In some embodiments of the present invention, the light receiver has a color the same as a color of the second surface area.

In some embodiments of the present invention, the second surface area surrounds a periphery of the first surface area.

In some embodiments of the present invention, the first surface area is circular, and the second surface area is annular.

In some embodiments of the present invention, the detection device including a first wall disposed between the first surface area and the second surface area.

In some embodiments of the present invention, the detection device includes a second wall extending along a periphery of the second surface area.

In some embodiments of the present invention, the first wall includes a surface facing toward the light emitter and having the first reflectance, and the first wall includes another surface facing toward the light receiver and having the second reflectance.

In some embodiments of the present invention, the first reflectance is greater than or equal to 90%, and the second reflectance is smaller than or equal to 10%.

In some embodiments of the present invention, the detection device further includes an optical top cap which has an optical lens and a third wall, and the optical lens has an inner surface and an outer surface. The third wall is disposed on the inner surface of the optical lens, and the third wall is in contact with the first wall to form a space accommodating the light receiver.

In some embodiments of the present invention, the detection device further includes a second wall extending along a periphery of the second surface area and a fourth wall disposed on the inner surface, and the fourth wall is in contact with the second wall to form a space accommodating the light receiver.

In some embodiments of the present invention, the light emitter is electrically connected to the substrate in a flip chip package or in a wire bonding package.

In some embodiments of the present invention, the light receiver is electrically connected to the substrate in a flip chip package or in a wire bonding package.

In embodiments of the present invention, a detection device is provided, and the detection device includes a substrate, a light emitter, and a light receiver. The light emitter with high reflectance is located on an area, and the light receiver with low reflectance is located on another area. Therefore, it is benefit for the light emitter to efficiently generate detection light outward, and stray light around the light receiver is absorbed, so as to prevent the stray light from affecting the light receiver.

It is to be understood that both the foregoing general description and the following detailed description are by examples, and are intended to provide further explanation of the invention as claimed.

Reference will now be made in detail to the present embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers are used in the drawings and the description to refer to the same or like parts.

Reference is made to, which illustrates a schematic view of a detection device. In some embodiments of the present invention, the detection deviceincludes a smart watch which is able to detect blood oxygen and pulse. The present invention is not limited in this respect. The detection deviceincludes an optical top cap, a light emitter, and a light receiver, and the light emittercan generate detection light to human body through the optical top cap. Therefore, the detection light can be reflected by the human body and received by the light receiver, so as to complete light detection to the human body.

In some embodiments of the present invention, the light emittercan include a light-emitting diode (LED), such as organic LED (OLED), mini LED, and micro LED. The present invention is not limited in this respect. In some embodiments of the present invention, the light receiveris disposed with respect to light frequency of the light emitter. If the light emitterincludes a red light resource and/or an infrared light resource, the light receiverincludes red light sensor and/or infrared light sensor. In addition, if the light emitterincludes a green light source, the light receiverincludes a green light sensor for detecting the pulse rate of human bodies.

Reference is made to.illustrates an internal view of the detection devicein.illustrates an internal view of the detection device, in whichrespectively show different viewpoints.illustrates a cross section view of the detection devicetaken from line-in. In some embodiments of the present invention, the detection deviceincludes a substratewhich can be disposed inside the detection device. The substrateincludes a first surface areaand a second surface area, in which the first surface areahas a first reflectance greater than a second reflectance of the second surface area. In addition, the light emitteris located on the first surface area, and the light receiveris located on the second surface area. The light receiverhas a reflectance the same as the second reflectance of the second surface area, and thus the light receiverhas an appearance reflectance the same as the second reflectance of the second surface area. The present invention is not limited in this respect. Since both the second surface areaand the light receiverhave low reflectance for absorbing stray light around the light receiver, the light receiverhas an outstanding light receiving ability.

In some embodiments of the present invention, the substratecan include a rigid substrate, a flexible substrate, a glass substrate, a sapphire substrate, a silicon substrate, a printed circuit board, a metal substrate, or a ceramic substrate, and the present invention is not limited in this respect.

In some embodiments of the present invention, the light receiverhas an appearance color the same as a color of the second surface area, and both the second surface areaand the light receivercan be black, purple, or blue for absorbing the stray light and preventing the stray light from affecting the light receiver. Moreover, the first surface areaand the second surface areacan be painted by solder mask coating, and the first surface areaand the second surface arearespectively have the first reflectance and the second reflectance which is different from the first reflectance. The color of the first surface areaor the color of the second surface areacan be original color of the substrate. For instance, if the substrateis purple, the solder mask coating can be applied to the first surface area, such that the first surface areahas a white surface. The second surface areahas the purple surface of the substrate, and the first surface areahas the first reflectance greater than the second reflectance of the second surface area. In addition, the first surface areaand the second surface areahave opaque materials for blocking light, and the opaque materials can include a light-absorbing material or a reflective material.

Specifically, light-absorbing materials have dark color which is hard to reflect light, and the light-absorbing material includes bismaleimide triazine resin and a light blocking material, such as black ink, metal, resin, and/or graphite. The metal can include chromium or nickel. In addition, the resin, such as polyimide and acrylate, can be used to form a main body, and the light-absorbing material, such as carbon and titanium oxide (TiOor TiO), can be evenly added to the main body. The light-absorbing material can be a mixture which includes a base and a light-absorbing substance. The base can be formed from a silicone-based material or an epoxy-based material, and the light-absorbing substance can include carbon, titanium oxide, or dark pigment. The present invention is not limited in this respect.

The reflective material is a mixture which includes a base and a high reflective substance, and the base is formed from a silicone-based material or an epoxy-based material. The high reflective substance can include titanium dioxide (TiO), silicon dioxide (SiO), aluminum oxide (AlO), potassium titanium oxide (KTiO), zirconium dioxide (ZrO), zinc sulfide (ZnS), zinc oxide (ZnO), or magnesium oxide (MgO).

In some embodiments of the present invention, the first reflectance is equal to or greater than 90%, and the second reflectance is equal to or smaller than 10%. In some preferable embodiments, the first reflectance is equal to or greater than 95%, and the second reflectance is equal to or smaller than 5%. In the most preferable embodiments, the first reflectance is equal to or greater than 99%, and the second reflectance is equal to or smaller than 1%. The higher first reflectance can improve the illuminating efficiency of the light emitter, and the lower second reflectance is benefit for improving light receiving ability of the light receiver, so as to prevent the stray light from affecting the light receiver.

In some embodiments of the present invention, the second surface areasurrounds a periphery of the first surface area. The first surface areais circular, and the second surface areais annular. In addition, the detection deviceincludes a plurality of the light emittersand a plurality of the light receivers. The light emittersare spaced apart from each other and located on the first surface area, and the light receiversare spaced apart from each other and located on the second surface area. The occupied space of the light emittersand the light receiverscan be reduced for improving the light receiving ability of the light receivers.

In some embodiments of the present invention, the detection deviceincludes a first wallwhich is located between the first surface areaand the second surface area. The first wallis across an interface between the first surface areaand the second surface area, and the first wallis located on the first surface areaand the second surface area, simultaneously. In addition, the first wallcan be a continuous piece of material or not a continuous piece of material. The first wallsurrounds the light emitter, in which the first wallhas an internal wall surfacefacing the light emitterand having the first reflectance, and the first wallalso has an external wall surfacefacing the light receiverand having a second reflectance. Therefore, the first wallcan prevent the detection light of the light emittersfrom being directly absorbed by the light receivers, and thus the crosstalk between the light emittersand the light receiverscan be avoided, such that the light receivershave an outstanding light receiving ability.

In some embodiments of the present invention, the detection devicehas an annular second wallwhich extends along a periphery of the second surface area, and an internal wall surfaceof the second wallhas the second reflectance lower than the first reflectance, such that the second wallimproves the light receiving ability of the light receiver. In addition, the light receiveris located between the first walland the second wall, and the external wall surfaceof the first wallfaces the light receiverand has the second reflectance. The internal wall surfaceof the second wallhas the second reflectance, and the first wallas well as the second wallcan efficiently absorb the unneeded stray light and avoid the crosstalk between the light emitterand the light receiver.

In some embodiments of the present invention, the first walland the second wallis fixed to the substrateby dispensing, in which the first walland the second wallcan be made of polymer or resin, such as thermoplastic and thermoset plastic. The thermoplastic can include polyphthalamide (PPA), acrylonitrile butadiene styrene (ABS), polyetheretherketone (PEEK), or other suitable materials. The thermoset plastic includes epoxy molding compound (EMC), silicone molding compound (SMC), or other suitable materials. In addition, the first walland the second wallcan also include the aforementioned the opaque materials which include a light-absorbing material or a reflective material.

In some embodiments of the present invention, the detection devicefurther includes the optical top capwhich includes an optical lensand an annular third wall. The optical lenshas an outer surface O and an inner surface I, on which the third wallis located. When the optical top capis fixed to the substrate, the third wallis in contact with the first wallto form a space accommodating the light emitters. The first walland the third wallcan both have the first reflectance which is greater than the second reflectance, and thus the light emittercan efficiently generate the detection light which is used to human bodies. Specifically, the annular third wallhas an internal wall surfaceand an external wall surface. The internal wall surfaceof the third wallhas a reflectance substantially equal to the first reflectance, and the external wall surfaceof the third wallhas a reflectance substantially equal to the second reflectance. In addition, the optical lensis a transparent structure which includes a light guiding lens or a light refraction lens, and the optical lenscan be made of transparent plastic or transparent glass. The outer surface O and the inner surface I can be flat surfaces, convex curved surfaces, or concave curved surfaces, and the present invention is not limited in this respect.

In addition, the detection devicefurther includes an annular fourth wall, and the fourth wallwhich is located on the inner surface I of the optical lenssurrounds the third wall. While the optical top capis fixed to the substrate, the light receiversare located between the third walland the fourth wall. Moreover, the fourth wallis in contact with the second wallto form a space accommodating the light receivers. The second walland the fourth wallhave the second reflectance lower than the first reflectance for efficiently absorbing the stray light and improving the light receiving ability of the light receivers. Specifically, an internal wall surfaceof the fourth wallhas a reflectance substantially the same as the second reflectance. The third walland the fourth wallcan be fixed to the optical lensby dispensing, and the third walland the fourth wallhave substantially the same materials as the first walland the second wall. The detailed information regarding the same materials of the first walland the second wallhereof are not repeated again.

In some embodiments of the present invention, the light emittersand the light receiverscan be disposed on the substratein a wire bonding package or in a flip chip package. Reference is made to, which illustrates a side view of the light receiver, and the light receiveris fixed to the substratein the flip chip package. The light receiverincludes a light sensing areaand a conductive end, and the substrateincludes a bonding pad B. The conductive endis electrically connected to the bonding pad B on the substrate, and a solder ball S on the bonding pad B is in contact with the conductive end. Therefore, the solder ball S is between the conductive endand the bonding pad B, and the light receiveris electrically connected to the substrate. Regarding the flip chip package, the light sensing areaof the light receiverfaces away from the substrate, such that the light sensing areahas significantly great area for improving the light receiving ability of the light receiver. In some embodiments of the present invention, the light emitteris fixed to the substratein the flip chip manner shown in.

Reference is made to, which illustrates a side view of the light receiverin accordance with some embodiments of the present invention. The light receiveris fixed to the substratein the wire bonding package, and a light sensing areaand a conductive endof the light receiverfaces away from the substrate. The conductive endis electrically connected to the bonding pad B and the solder ball S thereon via a metal wire L, so as to enables the light receiverto be electrically connected to the substrate. The present invention is not limited in this respect. In some embodiments of the present invention, the light emittercan also be fixed to the substratein the wire bonding manner shown in.

In embodiments of the present invention, a detection device is provided, and the detection device includes a substrate, a light emitter, and a light receiver. The light emitter with high reflectance is located on an area, and the light receiver with low reflectance is located on another area. Therefore, it is benefit for the light emitter to efficiently generate detection light outward, and stray light around the light receiver is absorbed, so as to prevent the stray light from affecting the light receiver.

Although the present invention has been described in considerable detail with reference to certain embodiments thereof, other embodiments are possible. Therefore, the spirit and scope of the appended claims should not be limited to the description of the embodiments contained herein.

It will be apparent to those skilled in the art that various modifications and variations can be made to the structure of the present invention without departing from the scope or spirit of the invention. In view of the foregoing, it is intended that the present invention cover modifications and variations of this invention provided they fall within the scope of the following claims.